<PRE><B>Question 992875</B>
in going a certain distance, a train travelling at the rate of 40 km/h takes 2 hours less than a train travelling at 30 km/h. Find the distance. 
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1st train::
rate = 40 km/h ; time = x-2 hrs ; distance = r*t = 40x-80 km
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2nd train:
rate + 30 km/h ; time = x hrs ; distance = r*t = 30x km
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Equation:
dist = dist
30x = 40x - 80
-10x = -80
x = 8 hrs
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Ans: Distance = 30x = 30*8 = 240 km
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Cheers,
Stan H.
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